Ed Ewell wrote:
I agree very much, the hazard is not the design of the equipment, but the
weakness is in the procedures?
Most amplifiers on stand by, the tubes or transistors do not draw current,
they
are biased off. (I say most) however going from stand by to operate the bias
voltage
goes to operating bias level, drive is applied to the amplifier and things work.
However all of the time the circuit is alive, just different voltage
levels....
When you take the cover off an amplifier, you are looking at death straight
on. Life is fairly long, death is instant. (If interlocks are activated the
amplifier
will possibly be dead? don't count on it?)
Do not place your hand in an amplifier with the power plug in the wall?
You are
asking for it.
If you are experienced, you will place one hand in your pocket when reading
voltages, best
is to power down, attach meter leads (with plug removed from wall socket), then
power
up.
Amplifiers are very powerful, but most dangerous, have some one help that is
experienced,
or ask.
Commenting on a stand by switch, is not wrong, but only asking for an
explanation. This
thread of experienced and helpful communication people is the best place for
information.
Ed K7DXV Oregon...
Ian Roberts wrote:
> Tom Rauch wrote:
> >
> > But anyone who removes twenty screws and still fails to remove a
> > plug from the outlet, reaches inside the PA plugged into an outlet,
> > turns the main power switch on, and expects one more level of
> > protection on another switch to save his life is being silly.
> >
> > You shouldn't use a metal file to check car batteries for charge
> > level (I watched someone do that at the race track), and you
> > shouldn't use a metal meat thermometer while naked and wet to
> > start a well pump.
> >
> > My guess is we have interfered with the natural selection process
> > far too long.
>
> If your saying these guys are fearless, I agree with you.....
>
> Ian ZS6BTE
>
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